Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Leszek Ian Cromwell, MSW

Social Worker in Longview, WA · enumerated 2009.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1386883676

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Registry record

Entity type Individual (Type 1)

Name Mr. Leszek Ian Cromwell

Credential MSW

Sex Male

Practice address 921 14th Ave, Longview, WA, 98632

Phone (360) 425-6064

Enumeration date Feb 11, 2009

Last updated in NPPES Feb 11, 2009

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers Primary

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

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Frequently asked questions

How do I verify Leszek Cromwell's NPI record?

Cross-check NPI 1386883676 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1386883676 active?

Yes, as of the latest NPPES snapshot, NPI 1386883676 is active (record last updated 2009-02-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2009-02-11.